Silicon-iron cast iron inoculant

Ferrosilicon is often used as a reducing agent in the metallurgical industry due to its high silicon content (silicon is a strong reducing agent) and relatively low price. Especially in the highly exothermic "metal thermal reduction method" (aluminum thermal method or a variant of aluminum thermal method).The most classic example is the production of magnesium metal by reducing dolomite (MgO. CaO) with silicon iron (especially high silicon silicon iron) (Pidgeon process): calcining dolomite (CaO. MgO) and silicon iron (FeSi75) powders are mixed in proportion and form particles. Under high temperature (1150-1200 ° C) and vacuum (~10 Pa) conditions, a reduction reaction occurred: 2 (MgO. CaO)+Si (Fe) ->2Mg (g)+Ca2SiO4+Fe. Magnesium vapor crystallizes and is recovered in the condenser. Although this method consumes relatively high energy, it is still an important production method.Ferrosilicon is also used to reduce ferrochrome and produce low-carbon ferrochrome: ferrochrome, ferrosili…